The 1000BASE-BX-D 20km TX1550nm/RX1310nm Simplex LC/UPC BiDi SFP Optical Transceiver Module is a high-performance, cost-effective SFP transceiver designed for Gigabit Ethernet single-fiber bidirectional communication. Operating at 1550 nm for transmission (TX) and 1310 nm for reception (RX), this module enables full-duplex data transmission over a single strand of singlemode fiber (SMF) for distances up to 20 kilometers.